JP5357228B2 - Mist removal device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a mist eliminator for efficiently collecting mist in a mist-containing gas, and preventing the collected mist liquid from being mixed again. <P>SOLUTION: The mist eliminator collects the mist in the mist-containing gas A by tube filters 9 provided in an apparatus body 5, and exhausts the collected mist liquid downward by gravity. The mist eliminator includes a supply portion 11 for supplying the mist-containing gas A at the lower part of the apparatus body 5, an arrangement portion 10 for vertically arranging the tube filters 9 at the upper part of the apparatus body 5. The mist eliminator is provided with openings 15 for supplying the mist-containing gas A from the supply portion 11 only to the hollow parts of the tube filters 9, between the arrangement portion 10 and the supply portion 11, and the mist-containing gas A is supplied from the lower part toward the upper part of the tube filter 9. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a mist removing device that collects and removes oil mist and the like contained in a gas.

  2. Description of the Related Art Conventionally, for example, a cutting oil is supplied to a processing part by a processing tool in a machine factory or the like for cooling or lubrication of the tool. As this cutting oil, oil-based cutting oil or water-soluble cutting oil is used. Such cutting oil scatters in the air during processing to become oil mist (including both “oil” and “water-soluble” in this specification and claims). In addition, in machine factories and the like, dust such as cutting powder is scattered. The scattered oil mist and the like are harmful to the health of the worker and also cause the surrounding machine to be contaminated. In addition, if air containing oil mist or the like is discharged outside the factory in this way, it may cause air pollution, so it must be completely removed.

  Therefore, in a factory where oil mist or the like is scattered, an oil mist removing device that collects oil mist from the air of the entire factory may be provided. However, in order to collect oil mist from the air of the entire factory, a large oil mist removing device is required, which requires a great amount of cost and installation location. In addition, the electrostatic dust collection type used in large oil mist removal devices may have a negative effect on the water content of the water-soluble cutting oil, and it is difficult to stably collect all the oil mists described above. .

  On the other hand, depending on the factory, machines that generate oil mist may be limited. Therefore, there is also a demand for a device that can collect mist by circulating only the air around the machine that generates the oil mist, not the large oil mist removing device that requires a large amount of cost and installation location as described above. is there.

  For example, as a conventional technique of this type, a tubular filter is provided by being suspended from a support plate, mist-containing gas is supplied from the upper part of the tubular filter to the hollow portion, and mist liquid collected by the tubular filter hangs down the tubular filter. There is a mist collecting device that falls and discharges it to a lower mist liquid storage unit (see, for example, Patent Document 1).

  In addition, as another conventional technique, there is an oil mist collecting device in which a primary filter suspended from a support plate and a secondary filter for collecting mist in gas that has passed through the primary filter are inclined. (For example, refer to Patent Document 2). Also in this oil mist collecting device, the mist-containing gas is supplied from the upper part of the primary filter to the hollow part, and the mist liquid collected by the filter drips down the filter and is discharged to the lower mist liquid accumulating part.

Japanese Patent No. 3278453 Japanese Patent No. 3107375

  However, in the collection device described in Patent Documents 1 and 2, since a high-concentration mist-containing gas enters from the top of the filter, the high-concentration mist is collected at the top of the filter, and the collected mist liquid Will fall down through the filter due to gravity and be discharged downward. For this reason, the entire surface from the upper part to the lower part of the filter is always wetted by the mist liquid, which hinders the gas flow and causes pressure loss.

  Moreover, since the entire surface of the filter is wet with the mist solution, dust is easily collected, the filter is clogged quickly, and the frequency of replacement of the filter is increased.

  In addition, since the gas in which the mist is collected by the filter passes through the mist liquid falling from the filter and the upper part of the mist liquid accumulation part, the gas after collecting the mist again comes into contact with the mist liquid and collects the mist. Oil mist re-scatters and odorous components are mixed in the finished gas, making it difficult to stably collect mist with high efficiency.

  Then, an object of this invention is to provide the mist removal apparatus which can collect the mist in mist containing gas efficiently, and can respond to the change of a filter area, without the mixed mist liquid mixing again.

In order to achieve the above object, the present invention is a mist removing apparatus that collects mist in a mist-containing gas by a tubular filter provided in the apparatus body and discharges the collected mist liquid downward by gravity. A supply part for supplying the mist-containing gas at a lower part of the apparatus main body, and a cylindrical filter disposing part for disposing the tubular filter in a vertical direction at an upper part of the apparatus main body. An intermediate plate is provided between the supply unit and the filter disposing unit, and the tubular filter is attached to a filter receiver protruding upward from the periphery of the opening provided in the intermediate plate so that the length can be changed. The filter disposition portion is configured to be removable, and the filter disposition portion is configured to be splittable between the upper position of the intermediate plate of the apparatus main body and the filter disposition portion so that the height can be adjusted . a circular cross section around the intermediate plate Projecting in a direction, wherein the lower end periphery of the filter arrangement portion provided joint for sealing between the circular cross section with a circular cross section provided at an upper end periphery of the filter arrangement portion, of the apparatus main body filter the top of the arrangement portion, characterized in that established a lid for sealing between the circular cross section. In this specification and claims, the mist containing the mist of the mist-containing gas is referred to as “mist liquid”. Further, the longitudinal arrangement of the tubular filter means that the axial center direction is arranged vertically. In this way, the mist in the mist-containing gas supplied from the lower part of the tubular filter into the hollow part of the tubular filter is collected from the lower part of the tubular filter, and the collected mist liquid travels through the tubular filter. Since it is discharged downward, the pressure loss is suppressed at the upper part of the tubular filter, and the mist can be efficiently removed without the mist liquid collected by the tubular filter coming into contact with the gas that has passed through the tubular filter. In addition, the filter area can be changed by adjusting the height of the tubular filter and the filter disposition portion according to the change of the place of use, the amount of treatment of the mist-containing gas, and the like.

In addition, a connecting portion that seals between the circular cross section of the supply unit is provided around the lower end, and an extension unit that is provided with a circular cross section around the upper end is provided. placed vertically, by fixing the respective extension unit in a sealed state, said tubular regulating the height of the filter area filter arrangement portions required to increase the filter forms configured to allow lever, the extension unit The height of the filter disposition unit can be adjusted by arranging it vertically above the supply unit, and the filter area can be easily changed by changing the length of the tubular filter.

  According to the present invention, the mist contained in the mist-containing gas is efficiently collected while suppressing the pressure loss by the tubular filter arranged in the vertical direction, and the mist liquid collected in the gas after collecting the mist is recontacted. It is possible to perform mist removal stably and efficiently without causing them to occur.

  Moreover, it can be easily adjusted to the filter area according to the change of the place of use, the processing amount of the mist-containing gas, and the like.

It is a perspective view which shows the mist removal apparatus which concerns on the 1st reference example of this invention. It is a front view of the mist removal apparatus shown in FIG. FIG. 3 is a cross-sectional view taken along arrow III-III shown in FIG. 2. It is a longitudinal cross-sectional view of the tubular filter shown in FIG. It is drawing which shows the metal fitting provided in the arrangement | positioning part of the tubular filter shown in FIG. 2, (a) is a top view of an attachment metal fitting, (b) is sectional drawing of an attachment metal fitting, (c) is a top view of a closing metal fitting, (d) is a sectional view of the closure fitting. It is a longitudinal cross-sectional view which shows typically the non-return valve shown in FIG. It is a schematic diagram which shows the flow of the gas in the mist removal apparatus shown in FIG. It is a front view of the mist removal apparatus which concerns on the 2nd reference example of this invention. It is a longitudinal cross-sectional view of the seal pot shown in FIG. It is a front view of the mist removal apparatus which concerns on the 3rd reference example of this invention. It is a top view of the mist removal apparatus shown in FIG. It is an expanded sectional view of the XII part shown in FIG. It is drawing of the sealing material in the mist removal apparatus shown in FIG. 10, (a) is a front view, (b) is an expanded sectional view of the XIII part shown to (a). It is a longitudinal cross-sectional view in the base of the tubular filter shown in FIG. It is a front view of the mist removal apparatus which concerns on the 4th reference example of this invention. It is drawing which shows the extension unit used in the mist removal apparatus which concerns on this invention, (a) is a half sectional front view, (b) is an expanded sectional view of the XVI part shown to (a). (a), (b) is a front view which shows typically the mist removal apparatus which concerns on this invention.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view showing a mist removing apparatus according to a first reference example of the present invention, FIG. 2 is a front view of the mist removing apparatus shown in FIG. 1, and FIG. 3 is an III-III arrow shown in FIG. FIG. In addition, the left half part of FIG. 2 has shown the inside.

  As shown in FIGS. 1 and 2, the mist removing device 1 includes a device body 5 on a frame body 3 supported by four casters 2. The frame body 3 is made of square members assembled in a rectangular shape, a top plate 6 is provided at the upper end of the frame body 3, and a bottom plate 7 is provided at a position located a predetermined amount above the lower end. An intermediate plate 8 is provided between 7 and the top plate 6. A tubular filter 9 is disposed on the upper surface of the intermediate plate 8 with the axial direction set vertically. In this reference example, the tubular filter 9 having a round cross section is used, but a polygonal cross section or the like may be used. Between the intermediate plate 8 and the top plate 6 is an arrangement portion 10 (arrangement space) of the tubular filter 9, and between the intermediate plate 8 and the bottom plate 7 is a supply portion 11 of the mist-containing gas A. (Supply space). In this reference example, the supply unit 11 is also a mist reservoir 12, and the mist collected by the tubular filter 9 is dropped and collected in the mist reservoir 12 by gravity. A drainage pipe 13 for discharging the mist liquid to another tank or the like is provided at the lower part of the mist reservoir 12. Further, a discharge port 17 having a predetermined diameter as an exhaust portion is provided in the top plate 6 at the upper portion of the arrangement portion 10, and this supply side is provided on the side of the supply portion 11 (right side in this example). A supply port 14 for supplying the mist-containing gas A to the part 11 is provided.

  A plurality of tubular filters 9 arranged on the upper surface of the intermediate plate 8 are arranged at substantially equal intervals, and a circular opening 15 provided on the upper surface of the intermediate plate 8 and a lower end inner diameter of the tubular filter 9 are provided. Are provided to match. The upper ends of these tubular filters 9 are closed. The tubular filter 9 of this reference example is formed with a height H of about three times the diameter D. The tubular filter 9 is preferably one that collects mist by collision caused by Brownian motion and hangs downward, and a filter formed of a plurality of layers is used. As described above, according to the tubular filter 9 disposed on the intermediate plate 8, the mist-containing gas A that has entered the hollow portion of the tubular filter 9 from the opening 15 of the intermediate plate 8 flows from the lower portion of the tubular filter 9 to the filter around the side surface. The mist is collected and removed through the surface 16, and the gas a from which the mist has been removed flows upward.

  As shown in FIG. 3, in this reference example, six of the tubular filters 9 are arranged, with three in the width direction and two rows in the front-rear direction. The number and arrangement of the tubular filters 9 are not limited to this reference example, and preferably two or more are arranged. Further, a drainage hole 18 is provided between the filters of the intermediate plate 8 for discharging the mist liquid that has dropped from the outer peripheral portion of the filter 9 and leaked onto the intermediate plate 8 to the mist reservoir 12. It has been. Below the drainage hole 18, there is provided a check valve 19 serving as a drainage valve that closes the drainage hole 18 when the arrangement portion 10 is sucked and opens the drainage hole 18 when the suction is not performed. Note that the discharge valve is not limited to the check valve 19.

  On the other hand, as shown in FIGS. 1 and 2, the supply unit 11 is formed with a large volume with respect to the diameter cross-sectional area of the supply port 14, and the mist-containing gas A supplied from the supply port 14 to the supply unit 11. The flow rate is greatly reduced. In this way, the mist-containing gas A is greatly decelerated and supplied to the tubular filter 9, whereby a small mist is collected on the filter surface 16 by the Blan movement, and the collected mist accumulates to become a large mist. The filter surface 16 is made to hang down.

  Further, a front cover 20 is provided on the front surface of the placement portion 10 that is opened when the tubular filter 9 is replaced or when a part of the tubular filter 9 is not used. The front lid 20 is fixed to the apparatus main body 5 with mounting bolts 21. In the illustrated example, a sealing material 23 is provided along the edge of the opening 22 of the apparatus main body 5, and the front lid 20 is fixed to the apparatus main body 5 with mounting bolts 21 so as to sandwich the sealing material 23.

  On the other hand, an opening / closing lid 24 is also provided on the front surface of the supply unit 11. The opening / closing lid 24 is also opened along the edge of the opening 25 of the supply unit 11 and is opened when the tubular filter 9 is replaced or when a part of the tubular filter 9 is not used. It is fixed with mounting bolts 27 with the sealing material 26 in between.

  Further, in this reference example, an exhaust portion is provided on the top plate 6, and a fan 30 equipped with a drive 31 (for example, an electric motor) is provided in the exhaust portion. By driving the fan 30, the gas a in the arrangement portion 10 is sucked from the discharge port 17 provided in the substantially central portion of the top plate 6. As the fan 30, a fan suitable for use conditions may be adopted. For example, a turbo fan having a sufficient suction capability against pressure loss is preferable. Since the gas a sucked by the fan 30 is a gas that has passed through the tubular filter 9 and collected mist, it is discharged from the exhaust port 32 into the atmosphere.

  Further, the fan 30 is configured to be variable in output so that the suction amount from the disposition unit 10 can be variably controlled. As this variable control, for example, inverter control can be employed. The fan 30 may be provided at a position away from the apparatus main body 5 as long as the fan 30 is configured to suck the gas in the disposition portion 10 from the discharge port 17 of the top plate 6.

  Furthermore, in this reference example, a differential pressure gauge 35 that measures the differential pressure between the internal pressure of the placement unit 10 and the internal pressure of the supply unit 11 is provided. Based on the measured value of the differential pressure gauge 35, the fan 30 is variably output-controlled through a control device 37 connected by a wiring 36. The differential pressure gauge 35 is obtained from the differential pressure between the internal pressure of the disposition unit 10 (outside pressure of the tubular filter 9) measured by the differential pressure gauge 35 and the internal pressure of the supply unit 11 (inside pressure of the tubular filter 9). It also becomes a measuring instrument that measures the pressure loss inside and outside. Therefore, when the differential pressure increases, the output of the fan 30 is increased to increase the supply pressure of the mist-containing gas A, and when the differential pressure decreases, the output of the fan 30 is decreased to decrease the supply pressure of the mist-containing gas A. Thus, the mist removing apparatus 1 can be operated efficiently according to the processing status.

  4 is a longitudinal cross-sectional view of the tubular filter shown in FIG. 2, FIG. 5 is a drawing showing a metal fitting provided in the arrangement portion of the tubular filter shown in FIG. 2, and (a) is a plan view of the mounting metal fitting, (b) is a sectional view of the mounting bracket, (c) is a plan view of the closing bracket, and (d) is a sectional view of the closing bracket. 6 is a longitudinal sectional view schematically showing the check valve shown in FIG.

  As shown in FIG. 4, the tubular filter 9 is attached to an upper portion of an attachment fitting 40 that is a detachable fixture that is fixed to an opening 15 provided in the intermediate plate 8 of the apparatus body 5. The mounting bracket 40 has a screw portion 41 inserted into the opening 15 of the intermediate plate 8 and a flange portion 42 formed on the upper portion of the screw portion 41. The flange portion 42 has a top surface on which the tubular filter 9 is attached, and a bottom surface that is in contact with the intermediate plate 8. The tubular filter 9 is attached to the upper surface of the flange portion 42 with screws 43 and is integrally fixed. The tubular filter 9 attached to the mounting bracket 40 has a filter inner diameter that substantially matches the inner diameter portion of the mounting bracket 40. The screw part 41 of the mounting bracket 40 is inserted from above the opening 15 of the intermediate plate 8 and is screwed with the nut member 45 to the screw part 41 from below the intermediate plate 8 while being positioned by the pin 44. Thus, the mounting bracket 40 is attached to the intermediate plate 8 so as to sandwich the intermediate plate 8. The upper and lower surfaces of the mounting bracket 40 are sealed by O-rings 49 provided in the following O-ring grooves 48.

  As shown in FIGS. 5 (a) and 5 (b), the mounting bracket 40 is provided with six fixing holes 46 for attaching the tubular filter 9 to the upper surface with the screws 43 inserted from the lower surface of the flange portion 42, and is aligned. Two pin holes 47 into which the pins 44 are inserted are provided at opposite positions. Further, O-ring grooves 48 are provided on the upper and lower surfaces of the flange portion 42 on the outer peripheral side of the fixing hole 46 and the pin hole 47.

  On the other hand, as described above, in this reference example, the filter area can be changed without using a part of the tubular filter 9. When this filter area is changed (when it is reduced in the state shown in FIGS. 1 and 2), the tubular filter 9 is removed integrally with the mounting bracket 40 so that a part of the tubular filter 9 is not used, and the opening at the position is opened. It can be reduced by fixing the following closure metal fitting 50 to 15.

  As shown in FIGS. 5 (c) and 5 (d), the closing bracket 50 is formed on the screw portion 51 inserted into the opening 15 of the intermediate plate 8 and on the upper portion of the screw portion 51, as in the case of the mounting bracket 40. Flanged portion 52. The flange portion 52 is provided with two pin holes 53 at the opposite positions at the same position as the mounting bracket 40. An O-ring groove 54 is provided on the lower surface of the flange portion on the outer peripheral side of the pin hole 53. Also when the closing metal fitting 50 is attached, the screw portion 51 is inserted into the opening 15 of the intermediate plate 8 from above and the nut member 45 is screwed into the screw portion 51 from below the intermediate plate 8 in the same manner as the attachment metal fitting 40. In this way, the intermediate plate 8 is attached. The closing metal fitting 50 is sealed by providing an O-ring 49 in the O-ring groove 54 on the lower surface.

  As shown in FIG. 6, the check valve 19 provided in the lower part of the drainage hole 18 of the intermediate plate 8 is connected to the small diameter part 60 extending downward from the drainage hole 18 and the small diameter part 60. The ball holding portion 61 having an enlarged diameter and a net portion 62 provided at the lower end of the ball holding portion 61 are provided. When the ball 63 placed in the ball holding portion 61 rises, the small diameter portion 60 is closed, and when the ball 63 descends, the small diameter portion 60 is opened to allow the mist m (FIG. 4) on the intermediate plate 8 to pass through the mesh portion 62. It is designed to discharge downward.

  Therefore, according to the check valve 19, when the fan 30 is sucking the inside of the arrangement portion 10 of the apparatus main body 5, the ball 63 is sucked up to the negative pressure arrangement portion 10 side and the small diameter portion 60. Is blocking. When the suction by the fan 30 is stopped, the inside of the arrangement portion 10 becomes atmospheric pressure, the ball 63 falls by its own weight, and is in a state indicated by a two-dot chain line, the small diameter portion 60 is opened, and the upper portion of the intermediate plate 8 is opened. 4 is discharged to the mist reservoir 12.

  Further, if such a check valve 19 is configured such that the ball 63 can be arbitrarily lowered and opened while the inside of the apparatus main body 5 is sucked by the fan 30, for example, the mist-containing gas A Even when the mist is collected from the mist, the mist liquid m can be discharged from the upper portion of the intermediate plate 8 to the mist reservoir 12. As the check valve opening configuration for opening the check valve 19 to collect the mist, for example, an exhaust introduction pipe 64 for introducing a part of the exhaust of the fan 30 from the exhaust port 32 to the upper part of the drainage hole 18 is provided. The ball 63 is temporarily moved downward by the push-in function of the ball 63 by the exhaust of the fan 30 introduced from the exhaust introduction pipe 64 by appropriately opening the exhaust introduction pipe 64 with an on-off valve or the like (2). It can be opened). The check valve 19 and the check valve opening mechanism are examples, and similar functions may be provided by other configurations.

  Further, as shown in FIG. 2 described above, a separator 65 (separator) for removing dust and the like in the mist-containing gas supplied to the supply port 14 is provided upstream of the supply port 14 of the mist removing apparatus 1. If it arrange | positions, even if mist containing gas A with which dust and water | moistures, such as metal powder generate | occur | produced in a machining factory etc. were mixed, for example, after removing dust and water | moisture content, such as metal powder, with the separator 65 beforehand, the mist removal apparatus 1 Therefore, the tubular filter 9 can be prevented from being clogged by the dust and moisture. As the separator 65, a centrifugal type, a collision plate type, or the like is used.

  According to the mist removing apparatus 1 configured as described above, when the fan 30 is driven as shown in the schematic diagram showing the gas flow in the mist removing apparatus of FIG. Since the gas a in the part 10 is sucked, the mist-containing gas A is sucked into the supply part 11 from the supply port 14 through the tubular filter 9. When the mist-containing gas A sucked into the supply unit 11 is sucked into the supply unit 11 from the supply port 14, the flow velocity is reduced in the space, and then supplied to the hollow portion of the tubular filter 9 from below. The mist-containing gas A supplied from the lower part to the upper part of the tubular filter 9 passes through a wide filter surface of the plurality of tubular filters 9 at a slow flow rate, and the mist is collected by the tubular filter 9 when passing. The mist collected by the tubular filter 9 hangs down along the tubular filter 9 by gravity and is discharged as a mist liquid m to the lower mist reservoir 12. The gas a that has flowed from the periphery of the tubular filter 9 to the disposition portion 10 is discharged from the upper discharge port 17.

  Thus, by the tubular filter 9 arranged vertically, the mist-containing gas A having a high mist concentration enters from the lower part of the tubular filter 9, and the mist collected at the lower part of the tubular filter 9 is lowered from the lower part. Therefore, the mist is collected from the gas having a low mist concentration at the upper part of the tubular filter 9, and a part where the mist is not collected (a part through which only the gas passes) is generated at the upper part of the tubular filter 9. You can The mist collection by the tubular filter 9 is performed in a state where the concentration and supply amount of the mist-containing gas A supplied into the tubular filter 9 and the amount of mist trapped by the filter surface 16 and dripping are balanced.

  Therefore, by setting the filter area (number) of the tubular filter 9 according to the use conditions, the mist collected at the lower part of the filter of the mist-containing gas A sucked from the lower part of the tubular filter 9 is moved downward from its lower position. Since the pressure loss due to mist can be suppressed at the upper part of the tubular filter 9 by discharging, the capacity of the fan 30 can be suppressed and the life of the fan 30 can be extended, and the cost can be reduced. Moreover, since mist having a high concentration is not always collected on the entire surface of the tubular filter 9, the replacement frequency of the tubular filter 9 is increased, and maintenance and inspection time and cost of the tubular filter 9 can be reduced.

  Also, the mist m that has come out of the tubular filter 9 to the upper portion of the intermediate plate 8 can be discharged to the mist reservoir 12 by opening the check valve 19. The gas a that exits the tubular filter 9 and is sucked into the fan 30 passes through the arrangement portion 10 in which the mist liquid m accumulates on the upper surface of the intermediate plate 8. The mist liquid m collected on the upper surface is not mixed into the gas a, and a stable mist removal rate can be maintained.

  Further, since the number of the tubular filters 9 can be increased or decreased in the mist removing apparatus 1, if a sufficient number of tubular filters 9 having sufficient capacity are provided in advance, various cutting machines and the like can be used. The filter area can be flexibly changed according to the conditions and the like, so that it can be widely used, and the mist in the mist-containing gas A under the use conditions can be efficiently removed with an appropriate filter (filtration) area.

  In addition, by controlling the output of the fan 30 to be variable, an optimum operation according to the mist-containing gas A is possible, and the mist removal device 1 that can operate efficiently for a long period of time and collect mist efficiently is configured. Can do.

  Further, it is possible to grasp the state of the tubular filter 9 from the measurement result by the differential pressure gauge 35 and to visualize the mist collecting state in the mist removing device 1. In the mist reservoir 12, a deodorizer that sterilizes the mist liquid stored in the mist reservoir 12 with ultraviolet rays, silver ions, or the like may be provided. Furthermore, when an odor component remains in the treated gas, an odor treatment device such as activated carbon adsorption, ozonolysis, ultraviolet irradiation, or the like may be provided at the subsequent stage of the device to deodorize it.

  An embodiment in which oil mist is collected from the air in the work place of the machine tool by the mist removing apparatus 1 according to the first reference example will be described below. In this embodiment, description will be given with reference numerals in the above reference example.

In the following examples, mist was removed from the air containing oil mist discharged from the turret type multi-task machine by the mist removing device 1. The tubular filter 9 of the mist removing apparatus 1 was formed by arranging six pipes having an outer diameter of 160 mm and a height of 500 mm. The processing air sucked into the mist removing apparatus 1 was supplied at a flow rate of 10 m ³ / min.

As an experimental result, the oil mist concentration of the processing air at the supply port 14 of the mist removing apparatus 1 was 3.5 mg / m ³ , but the oil mist concentration at the exhaust port 32 of the fan 30 was 0.01 mg / m ^3. It had decreased to. The removal rate is about 99.7%. Further, the temperature of the processing air before and after the treatment was 32.5 ° C. at the inlet of the mist removing apparatus 1, but was 25.0 ° C. at the outlet.

  Thus, according to the mist removing apparatus 1, it can be seen that the mist in the mist-containing gas A can be collected with high efficiency. Therefore, the gas after the mist is collected can be released into the atmosphere, and the atmospheric environment around the machine can be stably maintained.

  FIG. 8 is a front view of a mist removing apparatus according to a second reference example of the present invention, and FIG. 9 is a longitudinal sectional view of the seal pot shown in FIG. The mist removing device 70 of the second reference example discharges the mist liquid from the mist reservoir portion 12 and the arrangement portion 10 on the intermediate plate 8 in the mist removing device 1 of the first reference example via the seal pot 71. Like to do. In addition, the same code | symbol is attached | subjected to the structure same as the mist removal apparatus 1 of the said 1st reference example, and detailed description is abbreviate | omitted. Further, in the following description, the effects and the like related to the seal pot 71 will be described, and description of the same effects and the like as those of the first reference example will be omitted.

  As shown in FIG. 9, the seal pot 71 includes a flange portion 73 that is fixed to the bottom plate 7 with a mounting bolt 72 with a sealing material 79 (for example, an O-ring) sandwiched between the lower surface of the mist reservoir portion 12 and the flange portion 73. It has an outer cylinder part 74 that extends downward, and an inner cylinder part 75 that is smaller in diameter than the outer cylinder part 74 inside the outer cylinder part 74. The outer cylinder portion 74 is a liquid reservoir portion whose upper end and lower end are closed, and a lateral drainage port 76 is provided at an intermediate portion in the vertical direction. The drainage pipe 13 is connected to the drainage port 76. The inner cylindrical portion 75 of the cylindrical body extends from the upper end of the outer cylindrical portion 74 to an intermediate portion between the drainage port 76 and the lower end, and the upper end opening 77 of the inner cylindrical portion 75 opens to the mist reservoir 12. ing.

  As shown in FIG. 8, the intermediate plate 8 of the arrangement portion 10 is provided with a cylindrical drainage pipe 78 that allows the upper surface of the intermediate plate 8 to communicate with the inner lower end of the outer cylinder portion 74. It has been. The drainage pipe 78 extends from the intermediate plate 8 to between the lower end of the inner cylinder part 75 and the lower end of the outer cylinder part 74.

  According to the mist removing device 70 provided with such a seal pot 71, the mist liquid in the mist reservoir 12 falls down along the inner cylinder 75 and accumulates in the outer cylinder 74, The mist liquid on the intermediate plate 8 travels down the drain pipe 78 and accumulates in the outer cylinder portion 74. The mist liquid collected in the outer cylinder part 74 seals the lower end of the inner cylinder part 75 and the lower end of the drainage pipe 78. When the mist liquid m accumulates in the outer cylinder part 74 and reaches the position of the drain port 76 of the outer cylinder part 74, the mist liquid m is discharged from the drain port 76 to the drain pipe 13. . In addition, by using the seal pot 71, the mist liquid m leaked onto the intermediate plate 8 is collected in the mist reservoir 12 while collecting the mist from the mist-containing gas with a negative pressure in the arrangement portion 10. It can be smoothly discharged together with the dripping mist m.

  10 is a front view of a mist removing apparatus according to a third reference example of the present invention, FIG. 11 is a plan view of the mist removing apparatus shown in FIG. 10, and FIG. 12 is an enlarged cross section of the XII portion shown in FIG. FIG. 13 is a drawing of the sealing material in the mist removing apparatus shown in FIG. 10, (a) is a front view, and (b) is an enlarged sectional view of the XIII portion shown in (a). FIG. 14 is a longitudinal sectional view of the base portion of the tubular filter shown in FIG. In addition, the same code | symbol is attached | subjected to the structure same as the mist removal apparatus 1 of the said 1st reference example, and detailed description is abbreviate | omitted. Moreover, the right half part of FIG. 10 has shown the inside.

  As shown in FIGS. 10 and 11, in the mist removing device 80, a cylindrical device body 81 is provided on an upper portion of a rectangular box-shaped frame body 82. As the apparatus main body 81, for example, a metal plate having a thickness of about 1 mm is formed with a bent portion to give strength, thereby reducing the weight of the apparatus main body 81 and reducing the cost. At the same time, the mist removing device 80 can be easily moved and rearranged. The apparatus main body 81 has a flange portion 83 for fixing to the frame body 82 at the lower end, and a bottom plate 84 is provided at a position above the predetermined amount. An intermediate plate 85 is provided further above the bottom plate 84 by a predetermined amount.

  In addition, a disc-shaped lid 90 that covers the entire upper surface of the cylindrical apparatus main body 81 is provided at the upper end of the apparatus main body 81. The lid 90 is fixed to the upper end of the apparatus main body 81 so that the inside of the apparatus main body 81 is sealed by tightening the fixing band 91 with the fixed handle 92 while being placed on the apparatus main body 81.

  A plurality of tubular filters 9 are disposed on the upper surface of the intermediate plate 85 with the axial direction thereof being vertically oriented, and the portion 86 between the intermediate plate 85 and the lid 90 is disposed on the tubular plate 9. (Arrangement space). In this reference example, as will be described later, a lower end attaching portion 99 of the tubular filter 9 is attached to a cylindrical filter receiver 88 projecting upward from the periphery of an opening 87 provided in the intermediate plate 85 via a sealing material 100. Inserted and arranged. In this example, six tubular filters 9 are arranged radially at equal intervals (partially omitted in FIG. 10). The tubular filter 9 of this reference example also has a round cross section, but may have a polygonal cross section or the like. Further, the intermediate plate 85 is provided with a check valve 19 serving as a discharge valve for discharging the mist liquid m discharged from the tubular filter 9 onto the upper surface of the intermediate plate 85 to a mist reservoir 96 described later. As shown in FIG. 6 described above, the check valve 19 is closed in a negative pressure state in which the disposing portion 86 is sucked, and is opened at atmospheric pressure.

  Further, a space formed between the intermediate plate 85 and the bottom plate 84 serves as a supply portion 95 (supply space) for the mist-containing gas A. Also in this reference example, the supply unit 95 also serves as a mist reservoir 96, and the mist liquid m collected by the tubular filter 9 drops and accumulates in the mist reservoir 96 due to gravity. . A drainage pipe 13 for discharging the mist liquid to another tank or the like is provided on the side of the mist reservoir 96. A supply port 14 for supplying the mist-containing gas A to the supply unit 95 is provided at a side portion of the supply unit 95 so that the mist-containing gas A of a machine or the like is supplied via a pipe 97. Yes.

  Further, an exhaust pipe 98 is provided at the center of the disposing portion 86 so as to penetrate the intermediate plate 85 and the bottom plate 84 downward. The exhaust pipe 98 is provided so that the upper end protrudes upward by a predetermined amount from the upper surface of the intermediate plate 85 and the lower end is located inside the frame body 82.

  In this reference example, an exhaust part is provided inside the frame body 82 below the arrangement part 86, and a flange connected to a flange provided at the lower end of the exhaust pipe 98 is provided at the upper end of the exhaust part. The fan 30 is provided. The fan 30 is driven by a drive machine 31 (electric motor). An exhaust port 32 for the gas a exhausted by the fan 30 is provided on the side of the frame body 82. The fan 30 sucks the gas a in the arrangement portion 86 below the intermediate plate 85 and exhausts it to the outside of the mist removing device 80.

  As shown in FIG. 12, the fixing band 91 for fixing the lid 90 to the apparatus main body 81 has a substantially V-shaped cross section, and the fixing handle 92 (FIG. 11) is closed to close the cylindrical apparatus main body. The lower part of the circular cross section 89 formed at the upper end of 81 and the upper part of the lid 90 are pressed, and the sealing material 93 provided on the lid 90 is pressed against the circular cross section 89 to be sealed. .

  As shown in FIG. 13 (a), the sealing material 100 provided on the filter receiver 88 (FIG. 10) protruding upward from the periphery of the opening 87 of the intermediate plate 85 is an annular sealing material, A plurality of inner peripheral convex portions 101 are formed, and a plurality of outer peripheral convex portions 102 are formed on the outer periphery. The inner circumferential convex portion 101 is provided with three strips at the inner surface position of the outer circumferential convex portion 102 at the upper and lower end portions and the central portion in the height direction. The inner diameter of the inner peripheral convex portion 101 is formed in such a size that it can be sealed against the outer surface of the filter receiver 88. Moreover, as shown in FIG.13 (b), the outer periphery convex part 102 is provided with four stripes between an upper-lower-end part and them. The outer diameter of the outer peripheral convex portion 102 is formed such that the inner surface of the lower end attaching portion 99 of the tubular filter 9 is in contact with the inner surface of the tubular filter 9 so as to be sealed.

  Thus, according to the sealing material 100 provided with the inner peripheral convex portion 101 and the outer peripheral convex portion 102, the tubular filter 9 can be easily attached to and removed from the filter receiver 88, and a stable sealing effect is maintained. be able to.

  As shown in FIG. 14, according to the tubular filter 9 in which the lower end attachment portion 99 is attached to the filter receiver 88 of the intermediate plate 85 through the sealing material 100 as described above, the mist-containing gas A is supplied to the lower supply portion 95. The mist liquid m in the mist-containing gas A supplied to the hollow portion of the tubular filter 9 through the opening 87 and removed by the tubular filter 9 is supplied from the filter receiver 88 through the opening 87 to the mist reservoir 96 (supply). Part 95).

  Further, the mist m that has flowed out from the lower part of the tubular filter 9 to the upper part of the intermediate plate 85 accumulates on the upper surface of the intermediate plate 85, and when the suction of the disposing portion 86 is stopped and becomes atmospheric pressure, the check valve 19 (FIG. 10) is opened and discharged to the mist reservoir 96.

  According to the mist removing device 80 as described above, the mist-containing gas A is sucked into the supply portion 95 from the supply port 14 by sucking the gas a in the arrangement portion 86 through the exhaust pipe 98 by the fan 30. The mist-containing gas A sucked into the hollow portion of the tubular filter 9 from the supply port 14 is collected by the tubular filter 9. The mist collected by the tubular filter 9 hangs down along the tubular filter 9 by gravity and is discharged as a mist liquid m to the lower mist reservoir 12.

  Further, the mist liquid m collected on the intermediate plate 85 becomes atmospheric pressure in the arrangement portion 86 when the suction in the arrangement portion 86 by the fan 30 is stopped, and the check valve 19 is opened to arrange the arrangement portion. 86 is discharged to the mist reservoir 96.

  Further, the mist liquid m collected in the mist reservoir 96 is discharged to another tank or the like via the drainage pipe 13. If a seal pot (not shown) is provided in the drain pipe 13 or other tank, the mist is trapped from the mist-containing gas A by setting the inside of the disposing portion 86 to a negative pressure as in the second reference example described above. While collecting, the mist liquid m dripping into the mist reservoir 96 can be smoothly discharged.

  In addition, since the mist removing device 80 is reduced in weight by reducing the weight of the apparatus main body 81, operations such as movement and rearrangement can be easily performed according to installation conditions and the like.

  FIG. 15 is a front view of a mist removing apparatus according to a fourth reference example of the present invention. The mist removing apparatus 110 of this reference example, like the mist removing apparatus 80 in the third reference example, can reduce the weight of the apparatus main body 81 and reduce the cost, and can easily move and change the arrangement of the mist removing apparatus 110. The gas a in the arrangement portion 86 is sucked upward while being able to be performed. In addition, the same code | symbol is attached | subjected to the structure same as the said 3rd reference example, and the description is abbreviate | omitted.

  As shown in the figure, the mist removing device 110 is provided with an exhaust port 112 at the center portion of the lid 111, and the gas a in the arrangement portion 86 is sucked upward by an exhaust pipe 113 connected to the exhaust port 112. Has been. In the case of this configuration, the inside of the arrangement portion 86 is sucked by a fan (not shown) of another device, or a fan (not shown) is provided at a location away from the mist removing device 110.

  The frame body 114 on which the apparatus main body 81 is provided has a simple structure in which a support column 115 having the caster 2 at the lower end is framed. The configuration in which the apparatus main body 81 is provided on the upper portion of the frame body 114 is the same as that in the third reference example.

  According to the mist removing device 110 as described above, the mist-containing gas A is sucked into the supply portion 95 from the supply port 14 by sucking the gas a in the arrangement portion 86 through the exhaust pipe 113. The mist-containing gas A is sucked from the supply part 95 into the hollow part of the tubular filter 9, and the mist is collected by the tubular filter 9. The mist collected by the tubular filter 9 hangs down along the tubular filter 9 by gravity and is discharged as a mist liquid m to the lower mist reservoir 12.

  Further, the mist liquid m collected on the intermediate plate 85 becomes atmospheric pressure in the arrangement portion 86 when the suction in the arrangement portion 86 by the fan is stopped, the check valve 19 is opened, and the arrangement portion 86 is opened. To the mist reservoir 96. The mist liquid m collected in the mist reservoir 96 is discharged to another tank or the like through the drain pipe 13 as in the third reference example.

  FIG. 16 is a drawing showing an extension unit used in the mist removing apparatus according to the present invention, in which (a) is a half sectional front view and (b) is an enlarged sectional view of the XVI portion shown in (a). FIGS. 17A and 17B are front views schematically showing a mist removing apparatus according to the present invention. Also in these drawings, the right half shows the inside.

As shown in FIG. 16 (a), the extension unit 120 is formed to have the same diameter as the cylindrical device body 81 in the third and fourth reference examples, and as shown in FIG. 16 (b). At the lower end, a joint 121 is formed in contact with the circular cross- section 89 formed at the upper end of the apparatus main body 81. The joint 121 is formed with a semicircular seal receiver 122 that opens downward, and a seal material 123 (for example, a rubber material) is provided on the lower surface of the seal receiver 122. In addition, a cylindrical skirt portion 124 that extends downward at the inner diameter portion of the apparatus main body 81 is formed on the inner periphery of the seal receiver 122. The extension unit 120 can be easily connected by inserting the skirt portion 124 into the upper end of the apparatus main body 81. Further, the upper end of the extension unit 120 is formed in the same shape as the circular cross section 89 of the apparatus main body 81.

  According to the joint portion 121 of the extension unit 120, the extension unit 120 can be connected to the upper portion of the apparatus main body 81 in the same manner as the lid 90 is fixed to the apparatus main body 81 by the fixing band 91 described above.

  As shown in FIG. 17 (a), when the extension unit 120 is used, the extension unit 120 is mounted on the upper portion of the apparatus main body 81, and these joint portions are connected by a fixing band 91 (not shown), thereby providing the arrangement portion 86. Since the tubular filter 9 disposed in the intermediate plate 85 is the long tubular filter 109, the filter area can be easily increased. That is, it is possible to easily cope with a change in the length of the tubular filter 109 (change in the filter area).

  Therefore, it is possible to easily adjust the filter area according to the change of the use place or the processing amount of the mist-containing gas A, and to provide a mist removing device that can easily cope with various use conditions. Become.

  FIG. 17 (a) shows an example in which a long tubular filter 109 is provided, but a filter connecting portion (joint portion; not shown) is provided at the upper end or lower end of the tubular filter 9 described above, and this filter connecting portion. If the tubular filter 9 is configured to be removable, the length of the tubular filter 9 can be easily changed by connecting or separating the same length of the tubular filter 9 in the axial direction (longitudinal direction) according to the use conditions. It can be a filter area. In addition, by using the same tubular filter 9, it is possible to improve productivity, such as sharing the tubular filter 9.

  In this way, whether the tubular filter 9 can be connected or separated in the axial direction to change the length or whether the filter area is changed by the tubular filter 109 having a different length is determined according to the use conditions and the like. That's fine.

  Further, as shown in FIG. 17B, as the position where the joining portion 121 can be divided, the apparatus main body 81 can be divided at a position in the vicinity of the intermediate plate 85 (in the illustrated example, the upper position). Also good. In this case, the joint portion 121 is provided at the lower end of the apparatus main body 81, a semicircular seal receiver 122 and a seal material 123 that are opened downward are provided, and the circular cross-sectional portion 89 is upward from the periphery of the intermediate plate 85. And are connected by a fixing band 91 (not shown).

  In this way, the filter receiver 88 for attaching the tubular filter 9 and the mist reservoir 96 are integrally manufactured, and the cylindrical device main body 81 manufactured separately is connected and integrated so that the components can be integrated. It can be manufactured separately to improve productivity. Moreover, if it can be divided at the lower part of the apparatus main body 81 at the time of maintenance and inspection, inspection of the tubular filter 9 and cleaning of the upper surface of the intermediate plate 85 can be easily performed.

  In the example shown in FIGS. 17A and 17B, one place in the height direction of the apparatus main body 81 can be divided. However, the number of divisions may be arbitrarily set at one place or two places. The division position may be set to an arbitrary position. Further, the present invention can be applied to any of the mist removing devices 80 and 110 of the third and fourth reference examples described above, and can be divided without being limited to the configuration in which the disposing portion 86 is sucked.

  Furthermore, the example in which the apparatus main body 81 in the third and fourth reference examples is formed of a metal plate has been described. However, the apparatus main body 81 can also be formed of plastic. The configuration is not limited to the above.

  The embodiment described above shows an example, and various modifications can be made without departing from the gist of the present invention. For example, the fan 30 is provided on the upstream side of the supply port 14, and the supply unit 11 is provided. The mist-containing gas A may be supplied from the upstream side, and the present invention is not limited to the above-described embodiment.

  The mist removing apparatus according to the present invention can be used for removing mist in the air in a work place or the like of a machine tool that uses cutting oil or the like. This is particularly useful when it is desired to change the filtration area as required.

1 ... Mist removal device
3. Frame body
5 ... Main unit
8 ... Intermediate plate
DESCRIPTION OF SYMBOLS 9 ... Tubular filter 10 ... Arrangement | positioning part 11 ... Supply part 12 ... Mist storage part 15 ... Opening 16 ... Filter surface 17 ... Discharge port 18 ... Drainage hole 19 ... Check valve (discharge valve)
30 ... Fan 32 ... Exhaust port 35 ... Differential pressure gauge (measuring instrument)
37 ... Control device 40 ... Mounting bracket (fixture)
DESCRIPTION OF SYMBOLS 50 ... Closure metal fitting 61 ... Ball holding part 63 ... Ball 64 ... Exhaust introduction pipe 65 ... Separator 70 ... Mist removal apparatus 71 ... Seal pot 78 ... Drainage pipe 80 ... Mist removal apparatus 81 ... Apparatus main body 85 ... Intermediate | middle board 86 ... Arrangement | positioning Installation part 87 ... Opening 88 ... Filter receiver 89 ... Circular cross-section part 90 ... Cover 91 ... Fixed band 95 ... Supply part 96 ... Mist reservoir part 98 ... Exhaust pipe 99 ... Lower end attachment part 100 ... Sealing material 101 ... Inner peripheral convex part 102 ... Peripheral convex part 109 ... Tubular filter 110 ... Mist removing device 111 ... Cover body 112 ... Exhaust port 120 ... Extension unit 121 ... Joint part
A ... Mist-containing gas
a ... Gas
m ... Mist liquid

Claims (1)

A mist removing device that collects mist in a mist-containing gas by a tubular filter provided in the apparatus body, and discharges the collected mist liquid downward by gravity,
A supply unit that supplies the mist-containing gas to the lower part of the apparatus main body,
A tubular filter disposing portion that disposes the tubular filter vertically in the upper part of the apparatus main body,
An intermediate plate is provided between the supply unit of the apparatus main body and the filter disposition unit,
The tubular filter is provided so as to be attachable to and detachable from a filter receiver protruding upward from the periphery of the opening provided in the intermediate plate so that the length can be changed,
The filter arrangement part is configured to be able to divide between the upper position of the intermediate plate of the apparatus body and the filter arrangement part so that the height can be adjusted, and around the intermediate plate that can be divided. A circular cross-section projecting upward, a joint that seals between the circular cross-section around the lower end of the filter arrangement and a circular cross-section around the upper end of the filter arrangement;
A mist removing device , wherein a lid that seals between the circular cross-sectional portions is installed at the uppermost portion of the filter arrangement portion of the device main body .

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